Stove-pipe damper



s. n. NYE.

Stoveppe Damper.

Patented April 24, 1866.

l? wwf@ Nrrn STATES PATENT OFFICE.

STOVE-PIPE DAMPER.

Specification forming part of Letters Patent No. 54,197, dated April 24,1866.

To all whom it may concern:

Be it known that I, S. R. NYE, of Barre, in the county of Worcester andState of Massachusetts, have invented a new and useful Improvement inDampers for Stove Pipes or Flues; and I hereby declare that thefollowing is a full and exact description thereof, reference beinghad'to the accompanying drawings, making a part ot' this specification,in which- Figure l represents a top view, showing the damper partiallyopen. Fig. 2 is a section of the same on a line, x, and Fig. 3 is asection on the line y y of Fig. 1.

Similar letters indicate like parts-in the sev eral gures.

The object of' my invention is to graduate the escape of the smoke andproducts of combustion in the pipe or flue so that heat shall beretained and radiated to the greatest advantage while escaping throughthe pipe, and the invention consists in constructing the damper in twoseparate parts or sections, each part being composed of curved concaveribs, one ot' the said parts being made to turn either inconnection withor independently of the other.

Referring to the drawings, A represents an annulus, made concave on itsunder side, as shown in Figs. 2 and 3, and designed to t closely, butallowed to turn within the pipe or flue, being supported in the same bythe projection or screw d on one side and the rod E on the other.

B represents a series of curved parallel ribs or bars, made concave ontheir under sides, and cast With or forming a part of the annulus A.These ribs or bars B are curved from circumference to center, as shownin the drawings. At the center they form a reverse curve or grooveextending across the damper. Fitting Within this groove is a spindle orshaft, D, upon which is cast a series of .concave curved ribs, C C', ofsimilar form With the ribs B, and designed to cover the spaces betweenthe same. i In joining the two parts of the damper together the ribs Care passed through between the ribs B, so as to close the same on theunder side, while the ribs C are made to close the spaces on the upperside of the damper. A screw, d, is then inserted in the end ofthespindle, and a rod, E, provided with a thumb-piece, F, is screwed intothe opposite end. By turning the ribs C C the openings in the damper maybe graduated for the escape of more or less of the smoke and gases, ascircumstances require. By closing the ribs C C' entirely and continuingto turn the thumbpiece F the damper will be turned so as to admit ot' afree passage for the smoke and gases when necessary.

A ledge or projection may be provided on one side of the pipe,itnecessary, in order to prevent the damper from turning in the oppositedirection. y

The annulus A is made concave on its under side, and the two series ot'ribs are curved and also made concave on their under sides for thepurpose of deflecting the smoke and gases as they come in contact withthe said concave surfaces, and thus serve to retain and radiate the heatas it ascends the chimney or pipe.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

The abovedescribed damper, consisting ot' the concave annulus A, thecurved concave bars or ribs B, and the ribs C C', constructed andoperating as and for the purpose specified.

S. R. NYE.

Witnesses:

J oHN D. BLooR, J oHN S. HoLLINGsHEAD.

